RWS Waterinfo Api Node

Node.js wrapper for the RWS waterinfo api.

Docs about the API can be found here, or here for more modern documentaion. Docs are in english, but the API itself is mostly Dutch. This wrapper is mostly in English, aside from a couple variable names.

Table of contents

• Table of contents
• Installation
• Methods
  • getLocations
  • getMetadata
  • getObservations
    • requestData (ObservationRequestData)
  • getLatestObservations
    • requestData (LatestObservationRequestData)

Installation

npm install rws-waterinfo-api

Usage

import * as rws from 'rws-waterinfo-api'

rws.getLocations()
   .then(locations => console.log(locations))
   .catch(err => console.error(err))

// Or import a single function
import { getLocations } from 'rws-waterinfo-api'

getLocations()
   .then(locations => console.log(locations))
   .catch(err => console.error(err))

Methods

getLocations

getLocations(): Promise<StationLocation[]>
getLocations(rawData: true): Promise<MetadataResponse>

Get all available stations for use in getObservations and getLatestObservations.
Returns StationLocation[] by default. Pass in true to get the raw data.

getMetadata

getMetadata(): Promise<MetadataParsed[]>
getMetadata(rawData: true): Promise<MetadataResponse>

Get all available variables for use in getObservations and getLatestObservations.
Returns MetadataParsed[] by default. Pass in true to get the raw data.

getObservations

getObservations(requestData: ObservationRequestData): Promise<Observations>
getObservations(requestData: ObservationRequestData, rawData: true): Promise<ObservationsResponse>

Get RWS observations data for the given variables, at the given station location, within the specified timeframe.
Returns Observations by default. Pass in true after the requestData object to get the raw data.

requestData (ObservationRequestData)

Object in the following format:

{
   variables: {
      grootheid?: string;
      eenheid?: string;
      compartiment?: string;
      hoedanigheid?: string;
      meetapparaat?: string;
      parameter?: string;
   };
   location: {
      coordinates: {
         x: number;
         y: number
      };
      code: string;
   };
   period: {
      start: string;
      end: string;
   };
}

Available variables can be fetched using the getMetadata method. Variables are in Dutch because the data the description they contain are also in Dutch, and I'm not sure how to translate each of them. Feel free to make a PR to correct this.
Main variables you'll likely want to use are grootheid, which is used to get a single data type (e.g. windspeed with code WINDSHD), and compartiment, which is used to get a group of pre-defined data types (e.g. air with code LT to get all data related to the air (wind speed, direction e.t.c.)).

Available locations can be fetched using the getLocations method.

Period is an object consisting of a start and end date. The strings need to be in ISO format. For example: 2022-04-26T20:30:00.000+01:00.

getLatestObservations

getLatestObservations(requestData: LatestObservationRequestData): Promise<Observations[]>
getLatestObservations(requestData: LatestObservationRequestData, rawData: true): Promise<LatestObservationResponse>

Get latest RWS observation data for the given variables at the given station location(s). Returns Observations[] by default. Pass in true after the requestData object to get the raw data.

This method differs from getObservations in the following ways:

• Only gets a single observation per location
• Accepts multiple locations
• Accepts multiple variables

requestData (LatestObservationRequestData)

// Both variables and locations can also be an array of objects, if fetching multiple.
{
   variables: {
      grootheid?: string;
      eenheid?: string;
      compartiment?: string;
   };
   locations: {
      coordinates: {
         x: number;
         y: number
      };
      code: string;
   };
}

Available variables can be fetched using the getMetadata method.
Available locations can be fetched using the getLocations method.